荔枝核多酚类物质的分离与鉴定

Isolation and Characterization of Polyphenols in Seed of Litchi chinensis

目的:研究荔枝核的多酚类物质成分。方法:采用65%乙醇提取荔枝核,经系统溶剂萃取后,用硅胶柱色谱、聚酰胺柱色谱以及制备薄层色谱进行分离纯化,根据理化性质和波谱分析鉴定化合物的结构。结果:从荔枝核乙酸乙酯萃取物中分离鉴定了4个多酚类化合物,分别为原儿茶醛(Ⅰ)、原儿茶酸(Ⅱ)、胡萝卜苷(Ⅲ)和(-)-表儿茶素(Ⅳ)。结论:其中化合物Ⅰ、Ⅲ、Ⅳ为首次从该植物中分离得到。

Objective ： To study the chemical constituents of polyphenols in seed of Litchi chinensis. Methods ： The seeds of Litchi chinensis were extracted by 65% ethanol, then the compounds were separated by repeated silica gel, polyamide and preparative TLC. The structures of polyphones isolated were identified by analysis of their spectral datas and chemical properties. Results ： Four polyphones compounds were isolated as protocatechuic aldehyde （ Ⅰ ）, protocatecbuic acid （ Ⅱ ）, daucosterol （ Ⅲ ） and （ - ）-epicatichin （ Ⅳ ）. Conclusions ： Compounds Ⅰ ,Ⅲ and Ⅳ are isolated from this plant for the first time.